Steam generator Methods for water quality conditioning include:
1) Fully evaporative treatment. It means that the feedwater and boiler water are treated with evaporative alkali (such as ammonia or neutralizing amine) and deoxidizer (hydrazine or other organic deoxidizer). This conditioning method is applicable to both once through boilers and drum boilers. The cost of using chemicals in this conditioning method is relatively high, and some chemicals are highly toxic;
2) Neutral water treatment. It means that the feedwater of steam generator is neutral, without adding or participating in a few evaporation alkalis, and taking part in the treatment method of oxidant, so as to form a high potential Fe2O3 protective film on the metal surface, so as to avoid corrosion and reduce the carrying of metal oxides. This conditioning method is applicable to supercritical pressure once through boilers, as well as drum boilers of air cooling units. Its advantages are to save reagents, carry less copper and iron oxides in the feed water, extend the cleaning cycle of the steam generator, and extend the operation cycle of the condensed water treatment desalination equipment.
The boiler safety valve is an active pressure relief alarm device. His main function is: when the boiler pressure exceeds the specified value, he can actively open the steam exhaust pressure relief, prevent the pressure from rising continuously and send out an audible alarm to warn the stoker, so that necessary measures can be taken to reduce the boiler pressure to ensure the safety of the boiler and steam turbine.
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